The D-54 is an automatic machine gun with a high rate of effective fire primarily designed to be used against air targets flying at an altitude of about 1600 meters. However, as its secondary role, the D-54 can be used against the ground targets specially the moving infantry troops at a range of 3300 meters. This machine gun can be mounted and used on the ground, on vehicle, on naval craft and on helicopter. It is equipped with a mechanical sighting device and a mechanical elevating and traversing assembly.